Slow terminal history browse using vesafb

maxkukartsev · 07-10-2010, 02:02 PM

Hello everyone,

I've just installed Slackware 13.1 and am using a VESA framebuffer on a dv5-1251nr HP laptop with standard hardware.

In bash when I browse the command history using the up/down arrow keys the input line changes rather slowly.

For example, when I am on the history command

Code:

cp /boot/kernel-2.6.33.4 /boot/kernel-2.6.33.4.old

and the next command I go to is

Code:

make modules_install

The terminal input line deletes each character from the beginning and changes something like this:

Code:

cp /boot/kernel-2.6.33.4 /boot/kernel-2.6.33.4.old
p /boot/kernel-2.6.33.4 /boot/kernel-2.6.33.4.old
 /boot/kernel-2.6.33.4 /boot/kernel-2.6.33.4.old
...
/kernel-2.6.33.4.old
make modules_install

But going the opposite direction, from

Code:

make modules_install

to

Code:

cp /boot/kernel-2.6.33.4 /boot/kernel-2.6.33.4.old

is instant.

The effect does not happen with VESA turned off.
I've used VESA on other computers without this problem.

Thanks a lot.

maxkukartsev · 08-18-2010, 05:02 PM

I tried other linux distros on the same machine (gentoo, arch), but the slow scroll problem only appears in Slackware. So it's not because of the computer and probably not a problem with the generic VESAFB driver. Anyone experienced a similar issue?

Thanks.